Grid-Connected Photovoltaic System Based on QZSI

2013 ◽  
Vol 722 ◽  
pp. 166-170
Author(s):  
Jie Liu ◽  
Fei Wu
Keyword(s):  
Coordinate System ◽  
Energy Conversion ◽  
Network Structure ◽  
Control Strategy ◽  
Decoupling Control ◽  
Photovoltaic System ◽  
Voltage Source ◽  
Matlab Simulink ◽  
Grid Connection ◽  
Reactive Current

Quasi-Z-source inverter (QZSI) is a new topology, which has been proposed to be simple and realize the single stage energy conversion in recent years. Due to the unique impedance network structure, it has the characteristic of shoot-through. In this paper the voltage-source QZSI is applied to grid-connected photovoltaic system. Firstly the operating principle of QZSI is deep analyzed, and then a grid-connected photovoltaic system using a QZSI is proposed. In order to conform to the requirement of grid-connection, the decoupling control thought of active current and reactive current by d-q rotating coordinate system and the modified PWM strategy of this system are studied. The rationality and feasibility of the proposed control strategy is verified through MATLAB/Simulink.

Vector Decoupling Control Strategy for Three-Phase Voltage Source PWM Rectifier

2013 ◽  
Vol 336-338 ◽  
pp. 450-453
Author(s):  
Jian Ying Li ◽  
Wei Dong Yang ◽  
Ni Na Ma
Keyword(s):  
Power Factor ◽  
Control Strategy ◽  
Reactive Power ◽  
Decoupling Control ◽  
Voltage Source ◽  
Pwm Rectifier ◽  
Phase Voltage ◽  
Unity Power Factor ◽  
Three Phase ◽  
Rotating Coordinates

In view of the fact that active power and reactive power have coupling relation, a novel vector decoupling control strategy is presented for three-phase voltage source PWM rectifier. In the paper, the power control mathematical mode of the PWM rectifier is deduced based on the mathematical model of rectifier in synchronous d-q rotating coordinates, and a new voltage feed forward decoupling compensation control strategy is proposed. The simulation results show that the voltage and current of the three-phase PWM rectifier have better respond preference, the current aberrance is smaller and the voltage is steady under the control strategy. The PWM rectifier can implement PWM commute with unity power factor, but also feed back the energy to AC side with unity power factor.

scholarly journals Simulation of the Immunity Test of a Photovoltaic System Disturbed by Electromagnetic Voltage Surge

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3646
Author(s):  
Dorota Bugała ◽  
Artur Bugała ◽  
Wojciech Machczyński
Keyword(s):  
Computer Simulation ◽  
Electromagnetic Compatibility ◽  
Tracking System ◽  
Photovoltaic System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Computer Simulation Model ◽  
Waveform Generator ◽  
Matlab Simulink ◽  
Electromagnetic Disturbances

This paper presents a computer simulation model (in the MATLAB/Simulink environment) of a photovoltaic system disturbed by a 1.2/50 µs voltage surge pulse, while operating as part of the fixed system of an intelligent building. The tested part of the system consisted of a single PV module and a single-phase DC/AC voltage source converter provided with a maximum power point tracking system. The simulation of the test performed in accordance with the IEC 61000-4-5 standard required the development of a model of a surge waveform generator and a model of a coupling/decoupling network. The 1.2/50 μs voltage surge pulse was introduced into the system from the power grid side. During the test significant changes in the value of the AC voltage and current were found in the DC/AC converter system. The results of the computer simulation tests were verified with measurements performed in an accredited electromagnetic compatibility laboratory using the instructions specified in IEC 61000-4-5. The MATLAB/Simulink environment was proved as a useful tool of the assessment of effects of conducted electromagnetic disturbances on electronic/electric devices.

Strategy for Grid-Connection Control of Photovoltaic System

2014 ◽  
Vol 1070-1072 ◽  
pp. 35-38
Author(s):  
Ju Bo Wang ◽  
Xiu Yang ◽  
Wei Bao ◽  
Wen Li Xu
Keyword(s):  
Reactive Power ◽  
Decoupling Control ◽  
Photovoltaic System ◽  
Photovoltaic Systems ◽  
Pv Inverter ◽  
Grid Connection ◽  
Active And Reactive Power ◽  
Power Decoupling ◽  
Simulation And Experiment

With more and more photovoltaic systems connected to the grid, a strategy for grid-connection control is proposed. The topology of PV inverter and photovoltaic inverter and the active and reactive power decoupling control of photovoltaic system are analyzed. The feasibility and effectiveness of the strategy for grid-connection control is verified by simulation and experiment by the case on the RTDS.

scholarly journals Simulation of Grid-Tied Photovoltaic System Based on Solar Irradiance and Temperature Data in Semarang

2019 ◽  
Vol 125 ◽  
pp. 14006
Author(s):  
Ahmed Jumui Sumoi Fomba ◽  
Hermawan Hermawan ◽  
Trias Andromeda ◽  
Mochammad Facta ◽  
Iwan Setiawan
Keyword(s):  
Power Distribution ◽  
Solar Irradiance ◽  
Distribution System ◽  
Photovoltaic System ◽  
Weather Data ◽  
Voltage Source ◽  
Pv System ◽  
Matlab Simulink ◽  
Power Distribution System ◽  
Current Voltage

This paper presents a simulation of a grid-connected photovoltaic power system. A complex model of power distribution system is developed in MATLAB Simulink, then it will be simulated to determine an amount of power delivered to the grid based on irradiance and temperature. Solar irradiance data collection is conducted using a solar irradiance meter. These weather data (solar irradiances and temperatures) are transformed into signal inputs and model through a grid-tied Photovoltaic (PV) model system which consists of PV, incremental conductance Maximum Power Point Tracking (MPPT) method, DC-DC boost converter, inverter, voltage source converter (VSC) control algorithms, and grid equipment. The output variables can be related to current, voltage or power. However, tracing of the current-voltage (I-V) characteristics or power-voltage (P-V) characteristics are the vital need to grid-tied PV system operation. Changes in solar irradiance and temperature imply changes in output variables. Detailed modelling of the effect of irradiance and temperature, on the parameters of the PV module and the output parameters will be discussed. With the aid of this model, one can have a feasible idea about the solar energy generation potential at given locations. This comprehensive model is simulated using MATLAB/Simulink software.

scholarly journals Efficient Control of a Three Phase Grid Connected PV System

2021 ◽  
Vol 297 ◽  
pp. 01012
Author(s):  
Hicham Bahri ◽  
Mohamed Bahri ◽  
Mohamed Aboulfatah ◽  
M’hammed Guisser ◽  
El malah Mohammed ◽  
...  
Keyword(s):  
Control Strategy ◽  
High Efficiency ◽  
Control Strategies ◽  
Dynamic Performance ◽  
Atmospheric Condition ◽  
Photovoltaic System ◽  
Voltage Source ◽  
Good Precision ◽  
Pv System ◽  
Three Phase

This paper presents a new control strategy of a photovoltaic system, which consists of a photovoltaic generator PVG coupled to a three phase load and three phase grid by a three phase voltage source inverter VSI without DC-DC converter. The controller is designed by using Backstepping method based on d-q transformation of a new model of the global system. The main goals of this control strategy are to achieve the maximum power point MPPT with very good precision and the unity power factor in level of the grid power flow. Mathematical analysis demonstrate the asymptotic stability of the controlled system and simulation results proved that the controller has achieved all the objectives with high dynamic performance in presence of atmospheric condition changes. Moreover, the proposed controller shows a very good robustness under system disturbance, which presents the most important advantage of this controller compared to the other control strategies. Furthermore, this controller can operate with a high efficiency with any kind of the load.

Design and Simulation of the New Three-Phase Voltage Source PWM Rectifier

2013 ◽  
Vol 273 ◽  
pp. 343-349
Author(s):  
Yi Ming Zhang ◽  
Zhi Hui Zeng ◽  
Fei Yu ◽  
Jin Lan Feng
Keyword(s):  
Coordinate System ◽  
Control Strategy ◽  
System Stability ◽  
Voltage Source ◽  
Current Loop ◽  
Pwm Rectifier ◽  
Phase Voltage ◽  
Two Phase ◽  
Loop Control ◽  
Three Phase

Based on the principle of the three phase voltage source PWM rectifier, firstly, describes the topology of the three-phase VSR, and establishes the three-phase VSR’s mathematical model based on the three-phase stationary symmetric coordinate system (a,b,c) and two-phase synchronous rotating coordinate system (d,q); then analysis the three-phase VSR’s control strategy, and discusses the feedforward decoupling control strategy of the inner current loop, the outter voltage loop control strategy and the Space Vector PWM (SVPWM) control strategy. Secondly, builds a simulation model, simulates it in Matlab\Simulink environment.The simulation results show that the system has good current waveform of AC side current, high system stability, fast dynamic response speed, and can realize two-way flow of energy, energy feedback, and unit power factor control.

Grid-Connected Control Strategy Based on Fixed Mi Coefficient for Single-Phase Photovoltaic System

2014 ◽  
Vol 494-495 ◽  
pp. 1764-1770
Author(s):  
Wen Jie Zhu ◽  
Fei Rong ◽  
An Luo ◽  
Yong Xu ◽  
An Ping Hu
Keyword(s):  
Control Strategy ◽  
Single Phase ◽  
Closed Loop ◽  
Harmonic Distortion ◽  
Photovoltaic System ◽  
Voltage Source ◽  
Harmonic Suppression ◽  
Pv System ◽  
Simulation And Experiment ◽  
The Stability

This paper presents a grid-connected control strategy for single-phase photovoltaic (PV) system. Voltage source inverter (VSI) of a PV system is a core component which will produce some harmonics when the switch is operated between on and off continuously. To suppress harmonic distortion in the VSI output current, a fixed modulation index (MI) control loop based on PI controller is added to the traditional double closed-loop. The proposed method can fix the MI coefficient to be a large value in any conditions. The design of the controller and the stability of the grid-connected system are discussed in detail. Simulation and experiment results are presented to demonstrate the dynamic and precision performance of the controller for harmonic suppression when the proposed PV system is connected to the grid.

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